Produção e qualidade dos frutos das bananeiras Prata Anã e FHIA-01 tratadas com paclobutrazol

• Autor(a) principal: Cavatte, Rithiely Paschoa Queiroz
• Data de Publicação: 2007
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/4458
• topic: Musa spp.; Regulador de crescimento; Pós-colheita; Musa spp.; Growth regulator; Post-harvesting; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA

The objective of this study was to evaluate the productivity and some quality atributes of fruits from banana trees treated with paclobutrazol (PBZ). The experiment was conducted following 5x2 factorial arrangement in casualized blocks, with eight replications and one plant per experimental unity. Treatments consisted of five doses of PBZ (0.0; 0.5; 1.0; 1.5 and 2.0 g plant-1), applied on soil around Prata Anã and FHIA-01 banana trees four months after they were planted. Data were obtained during the first cicle and the bunchs were harvested when yellow color was observed on the peel of the first fruits. The period between planting and bunch harvesting; pseudostem length; number of active leaves at the moment of inflorescence emission and in harvesting, and productivity were evaluated. After harvesting, the bunch stalk and female rachis length, bunch mass; number of hands; average fruit mass; number of fruits/bunch; diameter; and commercial length of two central fruits of each hand were determined. The hands were weighed immediately after harvest, and the fruits of the second hand were individualized and put in refrigeration chamber at 20oC until ripening. When peel color were totally yellow, pulp firmness (kPa); total soluble solids (oBrix); titratable acidity (% malic acid); and fruit resistence to dropping (N) were evalued. The average cicle was of 507 days, not differing between doses and cultivars. The use of PBZ reduced pseudostem length. Increasing of PBZ doses increased the number of active leaves at inflorescence emission period of Prata Anã , but the effects on bunch were damaging, with reduction of the number of fruits per bunch, of commercial length and diameter of the fruits, which caused reduction of bunch mass and of productivity. On FHIA-01 cultivar, PBZ applied via soil reduced pseudostem length, improved bunch sustentation and increased fruit resistence to dropping, not influencing culture productivity. Through this study, it was possible to conclude that the most indicated doses of PBZ on FHIA-01 banana tree is around 1,0 g of PBZ plant-1.